In vivo depletion of PMN-MDSCs
To assess the effect of depleting PMN-MDSCs, mice were administered intraperitoneally with 400𝜇g anti-Ly6G antibodies per mouse each time (1A8, Bio X cell) or rat IgG2a isotype (Bio X cell) control antibodies on day 32, 34, 36, 38, 40 after first immunization. And mice were sacrificed on day 42.